Is 235 too hot?

JustJason

JustJason

Vice Admiral
Joined
Aug 27, 2007
Messages
5,319
Re: Is 235 too hot?

Cross your fingers you didn't melt the pocket cover.

replaced the water pump because some water was comming outa the weep hole
Click to expand...

Okay.... what water pump we talking about here? The only 1 with a weep hole would be the circuilating pump on the front of the engine.

Still start with the 2 questions I posed to you earlier. And going with what Don said. Did you replace just the impellar or did you replace the entire thing including the base and the cover?
 
L

luv2fishN.M.

Seaman Apprentice
Joined
Mar 9, 2009
Messages
48
Re: Is 235 too hot?

were talking about both. replaced both the impeller and the circulating pump. the motor would overheat at an idle but once the rpms were up to 2500 it would coo back down. thats what got me looking at everything. than i found the weep hole leaking. replaced the whole housing. upper and lower.thanks.
 
F

fishrdan

Admiral
Joined
Jan 25, 2008
Messages
6,989
Re: Is 235 too hot?

luv2fishN.M. said:
I dont know what to do?
Click to expand...

Get the IR thermometer as DonS suggested to verify the temps. I picked one up from Harbor Freight for $30 and it was well worth the money diagnosing a problem I had. (Harbor Freight has cheaper ones too and I've also seen them at auto parts stores, hardware stores,,, but they were more expensive)

http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=96451

Could be a whole slew of things. When you replaced the impeller were any pieces of the old one missing, and if so, did you find all of the old pieces? Electrical issue between the gauge and sender? .....

(sorry, a bit behind in the thread....)
 
L

luv2fishN.M.

Seaman Apprentice
Joined
Mar 9, 2009
Messages
48
Re: Is 235 too hot?

both. the one in the lower unit and the one on the motor. is there another one im missing?thanks.
 
L

luv2fishN.M.

Seaman Apprentice
Joined
Mar 9, 2009
Messages
48
Re: Is 235 too hot?

well thanks for all the advise. all of you are awesome. i will take apart the lower unit tomorrow and check over everything again. thanks so much again:D
 
Don S

Don S

Honorary Moderator Emeritus
Joined
Aug 31, 2004
Messages
62,321
Re: Is 235 too hot?

slasmith1 said:
Did you change the impeller in the out drive or just the one on the motor?
Click to expand...

luv2fishN.M. said:
both. the one in the lower unit and the one on the motor. is there another one im missing?thanks.
Click to expand...


Both :eek: :confused: :confused: There isn't a replaceable iimpeller on the engine. So, what impeller have you replaced on the engine, really????
 
L

luv2fishN.M.

Seaman Apprentice
Joined
Mar 9, 2009
Messages
48
Re: Is 235 too hot?

sorry o meant the circulating pump on the motor. also replaced the impeller in the motor. sorry
 
slasmith1

slasmith1

Lieutenant Junior Grade
Joined
Dec 2, 2008
Messages
1,028
Re: Is 235 too hot?

Don S said:
Both :eek: :confused: :confused: There isn't a replaceable iimpeller on the engine. So, what impeller have you replaced on the engine, really????
Click to expand...

Imeant the circulating pump also give us a little credit don.:D
 
L

luv2fishN.M.

Seaman Apprentice
Joined
Mar 9, 2009
Messages
48
Re: Is 235 too hot?

i think i need some sleep:eek: talk to you guys later. i just need to sleep on it. thanks again:D
 
chiefalen

chiefalen

Captain
Joined
May 18, 2008
Messages
3,598
Re: Is 235 too hot?

So it's a new day and everyone calmed down ?

Ok you installed a new housing and impeller in the drive correctly ?

You installed a new t-stat ? When you did notice any impeller pieces there?

Pull the long hose from the transom that goes to the t-stat off the transom end, no pieces in there?

No pieces in the engine mounted circulating pump ?

Now start it with water always going to the drive, never start the motor unless there is water going to the drive.

Still overheats, shut it down never run the motor if it is above 190.

Remove the long hose at the t-stat, put water to the drive, start the boat hows the water flow out of the hose should be 3 feet shooting in the air, shut off the motor do this test for no more then 5-6 seconds. No water , then no water is making it's way to the motor understand ?

Good water to the t-stat then it's it's down the line somewhere clogged up.

Every hose after the t-stat got to be pulled looking for a clog. No clogs ?

Pull the risers. They clogged up ? The flappers missing, fell down and blocked the exhaust ?

When you over heat sometimes that happens just compounds the overheating problem.

When you get the risers off take a pic and post it.
 
ziggy

ziggy

Admiral
Joined
Jun 30, 2004
Messages
7,473
Re: Is 235 too hot?

whats the pocket cover?
Click to expand...
it's a plastic piece that mounts to the bottom of your upper. the copper water pipe that comes out of your water pump housing in the lower mates to the water pocket cover in the upper. it's the connection between upper and lower for incoming water.
over heats can distort or melt the cover. it can leak at the seal where it's mounted to the upper.
i found mine leaking on my last boat while flushing water from ft to back getting impeller pieces out of the system. you DO NOT want to take the 4 screws out of this water pocket cover. they will likely break off. then you'll be sol as they are near impossible to get the broke ss 1/4-20 bolt out of the soft cast alum. upper housing. if you can't get them out. you need a new upper...
so don't even look crosseyed at them screws or they might break off. if it's leaking there or the water pocket cover is melted or distorted. you will obviously need to replace it. just be real carefull if you have to deal with it..
 
fat fanny

fat fanny

Lieutenant Commander
Joined
Feb 9, 2006
Messages
1,935
Re: Is 235 too hot?

With no experience w/ marine 4.3's. I would like to add that 4.3's in auto's do not like getting above OEM operating temps at all or you will be into allot for a replacement engine or rebuild proceed with caution getting her too hot!!. What temp should the water be out of the discharge when on muffs?
 
L

luv2fishN.M.

Seaman Apprentice
Joined
Mar 9, 2009
Messages
48
Re: Is 235 too hot?

do not have the manual but, don S said in previous threads that it should be running around 170. the thermostat a bought yesterday is a 143 deg. i took it out this morning just outa curiosity. the motor runs steady at 155 to 165:confused: does that make any sense at all? the thermostat should be wide open at 143. right? will it maybe run cooler once in the lake verses the muffs? thanks.
 
JustJason

JustJason

Vice Admiral
Joined
Aug 27, 2007
Messages
5,319
Re: Is 235 too hot?

possible you have a dud thermostat.
Throw it in a pot of hot water and see if it opens.

DO NOT run the motor without a t-stat outside of testing purposes.
 
You must log in or register to reply here.
Top